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Hardwood
Woods like oak, beech, birch, hard pine,
maple, pecan, and walnut.
Hartford loop
A loop of return piping that turns
downward to connect to the equalizer just
below the water level, preventing water from flowing out of a steam
boiler in case of a leak
in return piping.
Head
The top piece in a window frame.
Header
A horizontal framing member that carries
the load above a window or door
opening. Also called a lintel.
Header joist
The perimeter joist nailed to the sill.
Also called the rim joist.
Header rows
Rows of brick turned small end out as
ties to hold a brick wall together.
Hearth
The floor of the fireplace, usually
poured concrete about 4" thick.
Heartwood
The wood taken from the inner core of a
tree.
Heat exchanger
A heavy metal hood above the combustion
chamber that holds and
contains the burner flame. In a furnace, it separates exhaust air from
the circulating air that
heats the house. In a boiler, it separates exhaust air from the
circulating water.
Heat pump
A reverse-cycle air conditioner that
operates as both a cooling and heating
system by reversing the flow of refrigerant.
Heating chamber
In a gas water heater, the chamber where
the gas is burned.
Heating elements
In an electric water heater, the upper
and lower electrical heating units.
High-efficiencies
Gas and oil furnaces and boilers
with an operating efficiency in the 95%
range. Units typically have two or more heat exchangers, reducing exhaust
gas temperatures
low enough to condense. Also called condensing units.
Hip roof
A roof style with a slope on all four
sides, either meeting in a peak or a ridge line.
Hollow core door
A door with a honeycomb or patterned
cardboard core framed in solid
rails and jambs and covered with a veneer.
Hopper window
A window hinged at the bottom to open
inward.
Horizontal crack
A horizontal foundation crack often
caused by pressure being applied by
soil outside the foundation.
Hose bib
A faucet on the exterior of the home.
House main See
Service pipe.
Hot wire
An electrically charged wire, carrying a
charge of 120 volts in home circuits.
House trap
A large U-shaped fitting with capped
heads found where the home waste lines
join the public sewer.
Howe truss
A triangular roof truss that
Humidifier
A device added to a furnace that adds
moisture to the circulating air.
Hydronic boiler
A boiler used in a forced hot water
heating system. |